Note that the BIOS has changed on many (most?) new computers.
The new BIOS system is called EUFI (Unified Extensible Firmware Interface).
http://en.wikipedia.org/wiki/Unified_Extensible_Firmware_Interface
This makes the BIOS much more secure and, for example, stops malware being installed on your PC and running before windows starts up.
I think it also "ties" the version of Windows on your PC and stops a thief reinstalling other software (I am not sure of the details).
However the "old" type of BIOS is still available (called legacy or similar phrases) and you can go into the BIOS and switch from EUFI mode to legacy mode and this y make a reinstall of Windows easier.
However saying all that, I still DONT think your should do a reinstall of Windows.